燃气具气密性检测压力要求的识别和处置

Identification and Response of Requirements for Gas Tightness Testing Pressure of Gas Appliances

分析燃气具气密性检测过程中漏率与检测气体压力的关系,确定结构缺陷和强制密封缺陷导致的泄漏,其漏率与检测气体压力之间呈近似线性关系;而自紧密封缺陷导致的泄漏,其漏率则随检测气体压力提高而减少,从而需要针对不同的泄漏机理确定相应的检测气体压力。指出对于常见的燃气具产品,制订制造过程的气密性检测规程时,应考虑进行至少两次压力不同的检测,以较高的压力检测结构缺陷和强制密封缺陷导致的泄漏,同时,也需要以较低的压力检测自紧密封缺陷导致的泄漏。

The relationship between leakage rate and gas pressure in the process of gas tightness detection is analyzed, and the leakage caused by structural defect and forced seal defect is determined, and the relationship between leakage rate and gas pressure is approximately linear. However, the rate of the leakage caused by the pressure energized seal defect decreases with the increase of the detection gas pressure, so it is necessary to determine the corresponding detection gas pressure according to the different leakage mechanism. It is pointed out that for common gas appliance products, at least two different pressure tests should be taken into account when formulating the gas tightness detection rules in the manufacturing process, so as to detect the leakage caused by structural defects and forced sealing defects with higher pressure. At the same time, Leakage caused by pressure energized seal defects needs to be detected at lower pressure.